Half to john r



(No Model.)

J. MGGILLIVRAY.

SIDEWALK AND SIMILAR CONSTRUCTION. No. 388,986. Patented Sept. 4, 1888.

Ilnrrnn drames indiani Ormea;

JOHN MOGILLIVRAY, OF SACRAMENTO, CALIFORNIA, ASSIGNOR OF ONE- HALF 'IO JOHN It. VATSON, OF SAME PLACE.

SlDEWALK AND SIMILAR CONSTRUCTlON.

SPECIFICATION forming part of Letters Patent No. 388,986, dated September e, 1888.

Application led April 14, 1888. Serial No. 270,650. (No modehl To all whom t may concern.-

Be it known that I, JOHN MOGILLIVRAY, of the city of Sacramento, county of Sacramento, State of California, havein vented an Improve- 5 ment in Sidewalk and Similar Constructions; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to the art of constructing sidewalks, tloors, ceilings, &c.;and myinvention consists, essentially, in the novelgirders, hereinafter describedL and claimed,for supporting the material of the sidewalk, dsc.

My invention also consists, in connection with said gil-ders, of supporting planlring or platino; which may be either temporary or permanent, and in details of construction, all of which Ishall hereinafter more fully describe.

The object of my invention is to provide a simple and effective construction of this character which shall entirely obviate the necessity for the employment of the usual supporting-arches of brick-work which are now used with the ordinary T-shaped girders.

A 'further object is to provide for a construction which will permit of the ready removal and repair of any portion of the sidewalk or door without having to remove au entire section.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure l is a longitudinal section of the sidewall; and planlring C, the girders Abeing in cross-section. Fig. 2 is a perspective view from below, showing the planlring put under 5 the girder for a ceiling-foundation.

A A are the pillars, of masonry or brickwork, to be arranged as usual along the edge ofthe sidewalk and along the property-line. In practice, I prefer to place them closer together than is usually done. The pillars here shown are those along either the curb-line or the property-line, not both.

B B are the girders. These are made of suitable material, and each have in cross-section the shape of au isosceles triangle, so that their sides slope. They are placed upon the pillars A A transversely of the sidewalk, resting on theirbases,with their apices above. The girders are made with projecting base-flanges b,

o and said girdcrs are made hollow their entire length, beiugstrcngthened, however, by crossties b at intervals, in which are made holes lf for bolts, as I shall presently describe. Now, it is obvious that if I should construct the sidewalk of material such as natural stone, each stone having a length equal to the distance between the girders, the stone or stones would be supported by and between the sloping sides of the gir-ders, and be therefore prevented from falling through, for the sloping sides of the girders in connection with the stones answer the purpose of an arch, but when constructv ing the sidewalk or floor of artificial stone, cernent, or concrete, or other material which, when laid, is plastic or soft, and which hardens into an integral compact mass before being used, I use a planking or plating'C, which eX- tends between the girders, resting on the basciianges thereof, and upon this planlring I lay the sidewall; or door material, entirely filling in the space between the girders and above the level of their tops, so as to present a proper continuous surface. New, when the material hardens it tinds its support between and on the sloping sides of the gir-ders, thus practically becoming an arch of itself, and it will therefore make no difference whether the planlring G be permanent or temporary, for no support is then expected from it.

In some cases, as wherea floor is to be made, I may change the location of the planking C by bolting it up under the girders by bolts c, which pass through the holes b2 of the crossties b of the girders. The floor material is then laid on, as before, and the ceiling strips and laths may be secured to the under side of the planning. This is designed to be done where ceiling may be desired under a sidewalk for cellar or other apartment.

By this construction, therefore, I dispense with the usual supporting-arches of brickwork, and if any portion ofthe structure between the girders needs renewing I can make the necessary repair without disturbing surrounding portions.

Having thus described my invention,whatI claim as new, and desire to secure by Letters Patent, isn

I. In sidewalk and other similar construction, the parallel girders B I3, each having a triangular shape in cross-section, with sides sloping to an apex line above said girders hav- ICD and provided with cross ties b', having boltholes b2, in combination with a planking or plating, C, bolted to and supported by the girders and on which the material is laid, substantially as herein described.

3. In sidewalk and similar construction, the sloping-sided girders B B, for supporting the material ofthe Walk orsimilarconstrnction,and

having base-flanges b, in combination with the planking or plating C, on which the material is laid, substantially as described.

4. In sidewalk and similar construction, the 2o sloping-sided girders B B, for supporting the material of the walk or similar construction, and having cross-ties b on their bases, in conibination with the planking or plating C, bolted up under the cross-ties, substantially as and 25 for the purpose herein described.

In witness whereof I have hereunto set my hand..

JOHN MOGILLIVRAY. Witnesses:

G. T. JoNEs, MATT. F. JOHNSON. 

